Automatic drift.



D. E. HENNESSY.

AUTOMATIC DRIFT.

APPLlcAnoN man 1uNE21. 1915.'

l vnwlm@ .Hu SM ing description-and claims when considered DANIEL EKHnNNnssY; or HoLYoKi-J, 'MAssAcHUsnTTsQ vraarste;

Specification of Letters Patent.

Patented NcinfsQiai.

Application fued June 21, 1915. sei-iai No. 35,3415.

-To ,aZZ whomy it 'may concern:

Be it'knoivn that I, Danni, E. HENNEssY, va citizen of the United States, residing at Holyoke, county ofl-lampden, and State of Massachusetts, have linvented certain new and useful Improvements in Automatic Drifts, of which the following is a clear, full, pand exact description.l This invention relates to tools which are particularly adapted for effecting a relative separation of the objects Vor parts'operated upon7 and is herein shownv embodied ina tool of the type known as drifts.77 v

'An object of the invention is to provide a drift which vvill be Amuch more convenient to use than known drift constructions and which moreover will. operate `with greater certainty and with less shock to the vparts operated upon.

p provide a self-contained drift, that is7 one 'which will not require the cooperation of another tool for its successful operation.

' Other objects and important features of the invention will appear from the follow- ?in'connection vvith the 4accompanying drawings, in :Whichf vFigure l shows a preferred form ofthe invention andits manner of use in an ordibeing shown as is necessary foil illustrating themode of operation of theinvention; Fig.

` lar to Fig. 5 With the parts .in the position "which they assume vvhenthe 'handle of the drift is'turn'ed to move the "drill, out of its chuck.

In power-operated drillpresses, the spindle-shaft or drill-clnickcommonly Provided with a. tapered socketfi. inf-Which the tapered upper end of the shank 6 ofthe drill enough so that the drill when forced into the socket does not strike the bottom of the socket. Intersecting thissocket in the spindle shaft is a slot- 8 Whichtapersfrom ,Wedge 16,516 Wedge l: may conveniently belprovided with integralfears and @dat one sideof the shaft to the otlifer, theslot having` a'. large openingl()V upon one s1 de of other sideof the shaft. f

The purpose of the tapered vslot 8"in` the spindle shaft is to facilitate-the removalof vthe drill from the socket-Lit when" it dethe shaft and al small opening 12 ra.;

sired to replace it with drill ofanotherf;

size on for any other purpose, andlin'fpra-ctice' thls removal of the drill is usually@` effee-ted bynieans of a. drift; `which is simply a. Wedge-shaped vbar adapted to enter fthe slot 8 and to be forced into theslot unt-il fone ofits edges strikes the upper end 14 of the slot and its other edge strikes the upper end of the shank 6 of the .drill.- The operator strikes the end of the-drift with a hammer or other tool, thus forcing the drift. v

farther into the slot, whereby the drill shank is forced down in the v.socket 4 and loosened so that it can easily be removed. It will be observed that this modev yof loosening the drill requires'the use oftivo tools and. thus, takes considerable of the operators. time. An important obj ect of the invention', therefore,v is to provide an improved-drift which can be easily and quickly manipulated to remove the drill or other tool from its holder. and which will not require the-.coperati'on of any other tool forthis purpose. y

. Although, theinvention is herein described' Y in connectionvivithits Vuse in drill presses, nary drill press, only so much of the press .notrestrictedto the'illustrated `use and .that

itis of general applicability in the art-.tol which it relates. v .y

The :illustrated drift comprises aV Wedgeshaped body 164 having parallel lsides lfand- 20, andaipper andloiver converging sides 722 and 24 and a` cam- Q@ ivhich is preferablymade in the form of a cylindrical rod-2S slabbed off upononeside, the slabbedportion eX- tending preferably along the` ivholelengthp. of the side Q2 of thewedge 16g- Beyond the larger. end of the Wedge `16 therodispreferably extended and bentat an angle tothe 'cam Q6 to form a handle 30 byavhichlthe of the drift into the slot in the Spindle-shaft ,.lcavm vmaybev turned. Beyond thesmaller n or between any tive objects Whichithis desired to operate upon.

ln order .toconne the cam uponifthe itsrespective ends, the ears 36 being adapted tovbe received withinan-annular groove' 38 extending about thecam 26, whereby the :cam is held against endwise movement upon -the wedge, the ears 34 loosely embracing the cam at the other end of the wedge. l

' In curving the ears 34 over the cam 26"- to confinel the cam upon thewedge, space 1s provided for turning the'cam about its longitudinalaxis until its greater transverse dimension is 4normal tothe .side 22 of the wedge as `it i'sbeing turned from' the position .shown in Fig; 5to the position 'shown inFig;6.-"'

vThemode of will be readily understood .from the fore- .going description and from a study of Figs.

1, 5 and 6 ofthe dra-wings.' The 'drift be-,l ing-.inserted'in' the-slot 8 as shown in these figures, the operator grasps 'the handle 30 i and turns the cam from the position lshown `in Fig. 5to the position shown in 'Fig'. 6.]

It will be-noted that the 'wedge 16 is freely suspended from the cam 26 so thatwhen th'iei'foperatorpicks'up the driftby grasping tlie handle 30, the wedge 16 will gravitate spindle-shaft.

tfaposition'beneath the cam 26,1whereby the parts will be in position to be inserted readilyinto the vertical slot 8 --in` the WhatI claim as new is z;- ,1 15A drift shaped to enter a 'tapered slot and comprising two connected niembers.

halfngftheir reIIlO.te Sides converging .and

'-meansc'arried'by one of said members to .a effect a.. movement thereof toexpand said dri'lft across the taper of said slot.

nect'edmembers relatively movable: to ex- 'pand said drift across its taper, and means movement.

lstructed and arranged to expand said drift i carried by said 4drift-to effect said relative tapered drift comprising two cn-l nected relatively movable .members conwuniformly across its taper,and means carried by said drift to 'effect the -movement of said member`s.'-.

A55. i n bers .connected relatlvely movablefto` expand said drift across lits taper,- said mem- .4. A tapered drift comprising two" members being so shaped vand so connected as to'effectsaid expansion wi-thout v changing the other. dimensions' of said drift, and

l"means carried by. said drift for effecting f the relative movement of saidl members.

-' `5. A' tool'of the class describedlcompris` ing a. taperedmember, a-second member having substantially' parallel sides and lar- Operation of tlie." invention relative ranged to extend alongone of the tapered sides of said first lmember and normally in engagement therewith, said secondl member having Adifferent transverse dimensions and being connected to said first member and arranged to be turned about its longitudinal axis whereby said tool may be expanded laterally without changing its taper. 6.- A drift comprising a cam, and' a wedge carried by said cam.`

. 7 A drift comprising a cam, and a wedge carried by said cam, said cam being arranged to turn about an axis substantially parallel to' one of thetconverging sides of said wedge.

8.' A 'longitudinally' tapered drift comprising two members extending side by side lengthwise ofsaid drift, one of said members havingsubstantially parallel sides but different transverse dimensions and being arranged to be turned upon the other member to expand or contractsaid drift without varying its taper.

` 9. A tapered drift comprising a wedge,

. and means comprising a cam .connected to .said wedge .for expanding said drift across .its taper, 10. A tapered said drift across `its taper, said means being connected to said 'wedge and bein constructed andarranged to effect said expansion uniformly along one side of said dri-ft.

11. A tapered drift comprising a wedgeshaped member, and a member of substandrift comprising a wedge, Vand'means comprising a cam for expanding tially uniformcross-section but of different v transverse dimensions extending along one s lde of and connected to said wedge, said last mentioned member being arranged to be `turned in itsconnections to interpose differentdimensions between said wedge and .an object when a relative movement thereof is desired.

'12. A tapered drift comprising ajwedge having two parallel sides and two converging sides, a cam extending along one of the converging sides of and connected to said wedge and arranged to turnin its connections about an axis substantially parallel to'said side 'to expand and contract said drift, said cam being constructed andarranged to lie between the planes of the parallel sides of said wedge in all positions into which it may be turned.

13. yA' dri-ft comprising -a cam and a wedge freely .suspended `from said cam whereby ittends tp gravitate into a position beneath saidcam.

14. 'A drift comprising a wedge, and a cam extending along one of the converging sides of said wedge,l said wedge belng provided withintegral tongues adapted to shaped member and a member of substan-l tially uniform cross-section but of different transverse dimensions extending along one of the converging sides of said Wedge and normally in Contact therewith throughout substantially the Whole length of said side, and connections between said Wedge and said member constructed to permit said member to be turned upon said Wedge about an axis substantially parallel to the said l0 side of said Wedge Without disturbing 'the oontiguity of said Wedge and said member. Signed at Holyoke, Mass., this 1st day of May, 1915.

` DANIEL E. HENNESSY. Witnesses:

ABRAM BERNSTEIN, Cms. CLARK. 

